20091372 has 72 divisors (see below), whose sum is σ = 55770624. Its totient is φ = 5610528.

The previous prime is 20091349. The next prime is 20091377. The reversal of 20091372 is 27319002.

It is not an unprimeable number, because it can be changed into a prime (20091377) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27273 + ... + 27999.

It is an arithmetic number, because the mean of its divisors is an integer number (774592).

Almost surely, 2^20091372 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20091372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27885312).

20091372 is an abundant number, since it is smaller than the sum of its proper divisors (35679252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20091372 is a wasteful number, since it uses less digits than its factorization.

20091372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795 (or 786 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 20091372 is about 4482.3400138767. The cubic root of 20091372 is about 271.8545033564.

The spelling of 20091372 in words is "twenty million, ninety-one thousand, three hundred seventy-two".